You've tried water. You've tried soap. You've tried scrubbing and scouring. You've tried nasty chemicals that don't do what they say. So what do you do when it won't come clean? Roll out the pressure washer!
Wallpaper steamers are devices that are utilized in the task of removing wallpaper from walls. It helps to moisten and thus loosen the glue between the paper and the wall, making it possible to remove the paper with less effort.